Pump-valve.



ROLAND nn'nssnn nunrnn, or mronrrntn, 'IVIICI-IIGAN.'

TUMP-VALVE.

Specification of Letters Patent I Paten-ted Aug, 21}, 1915,

Application filed November 29, 1912. serial-no. 234,216.

The invention relates to improvements in pump valves.

The object of the present invention is to improve the construction'of pump valves,- and to provide a simple, inexpensive and eflicient pump valve of strong and durable construction, adapted to be readily applied to an ordinary pump cylinder without necessitating a change in'the valve seat, and,ca-

pable of opening and closing without liability of wedging or sticking.

With these and other objects in view, the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawing, and pointed out in the claim here to appended; it being understood that various changes in the form, proportion size and minor details of construction, within the scope of the claim, may be resorted to without departing from the spirit or sacrificing any of the advantages of the inven tion.

In the drawing, Figure 1 is a vertical sectional view of a portion of a pump cylinder,

equipped with a valve, constructed in ac cordance with this invention, the valve be ing shown in elevation. Fig. 2 is a central vertical sectional view of the pump valve. Fig. 3 is a detail perspective view of the pump valve, the depending rod and the elastic disks being removed.

Like numerals of reference designate corresponding parts in all the figures of the drawlng. I

In the accompanying drawing in which is illustrated the preferred embodiment of the invention, 1 designatesa pump valve constructed of suitable metal and consisting of a circular body having flat upper and lower faces 2 and 3 and provided at its periphery with integral guiding lugs 41:, having slightly curved outer faces adapted to fit the interior of a pump cylinder 5. The upper ends of the guiding lugs 4 are arranged in flush relation with the upper face 2, and the lower ends of the lugs terminate short of the lower face 3 of the valve, so that gravel or other accumulation will not get beneaththe and thereby interfere with :the proper seating of the valve and cause the. latter to leak. The lugs,

I whichnmay 'have a straight vertical side face at each=s 1de, are preferably provided with a slightly inclined face 7 at one side so that the water entering the cylinderwill impinge agalnstthe inclined face 7 of the lugs a and oause a slightturning or rotary movement of the valve to grind or wear the interior of the cylinder more evenly and thereby prevent any sticking or wedging of the valve in the opening and closing movements thereof.

The valve 1 is provided with a central vertical i-nteriorly threaded socket 8, extend ingyupwardly from the lower flat face 3 and terminating short of the upper face 2 so as to prevent any leakage at that point. The socket 8 receives the upper threaded end 9 ofa depending valve rod 10, which is screwed into the socket into engagement with the upper end wall thereof and which also extends through a central opening 11 of one or more elastic disks 12. The elastic disks 12, which may be constructed of leather, rubber, or any other suitable material, are secured on the rod by means of a nut 18, aunetallic washer 14: being preferably interposed between the nut and the lower one of the disks 12. As the threaded rod abuts against the upper end wall of the socket, the nut 13 coacts with the threaded rod in looking the latter to prevent the same from accidentally unscrewing. The disks are of the same diameter as the body portion of the valve, and the lower one fits against a valve seat 15 of a reducing coupling' member or union 16,which connects the lower end of the cylinder with lower piping, (not shown). By this arrangement the elastic disks are braced by the body of the valve and there are no projecting portions to be easily broken. By terminating the lugs short of the lower face of the cylindrical body, the lower portion of the latter forms a cylindrical extension, which effectually prevents the lugs from coming in I 7 close to the seat and prevents the suction of the pump from lifting the valve too high.

The lower end of the pump cylinder 5 the valve.

is providedvvith exterior screw thre ads'17,

Which are engaged by interiorscrew threads 18 of the coupling or union 16, a washer or gasket 19 being interposed between the parts at the valve seat C to prevent leakage. The

lower portion. ofthe coupling member: or

about eighteen inches in length and will extend down into 'thefsaid. piping. The

rod provides a balance valve, which is guided 1n its upward and downward-movement Without liability of sticking, and

the said rodis adapted to. cause the valve to drop flat against the valve seat and limi nate any tendency of the valve to turn edgewise and prevents cramping or sticking of What is claimedis:"

A pump valve comprising 'a substantially,

' cylindrical body of a diameter to :over the valve seat ofa pump cylinder and provided with peripheral, radially outstanding lugs having relatively broad outer facescurved in conformity with the inner face of the, pump cylinder to which the valve is ap straight up and down and the opposite face slanting downwardly towardthe straight face; and said valveat the outer curved faces of the lugs being of a diameter substantially that ofxthe inner diameter ofthe pump cylinder, and a single, free, elongated balance-- '35 a rod. depending from the center of the valve and of a length to overcomevthe tendency of the'valve to tip in its up and dovvn'movement's. i

In testimony that I claim theforegoing as my oWn, I ha'vefyhereto aflixed'my signature inthe presence oft vo Witnesses.

noLaNnnREssER DURFEE. I

Witnesses:

' .WM. PRIDEAUX, V

EDWARD T. PRIDEAUX.

Copies of this patent may be obtained for five cents eaehyb y addressing the Commissioner of Patents, WaLshington',D.G. 7

.plied, with one of the side faces of each lug 

